Method for the manufacture of a vinyl chloride copolymer solutio

Details Method for the manufacture of a vinyl chloride copolymer solutio Method for the manufacture of a vinyl chloride copolymer solutio

1979-07-12

1981-03-10

Levin, Stanford M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 336UA, 260 342, 525 60, 525 62, C08L 2904

Patent

active

042553148

ABSTRACT:
In the manufacture of a vinyl chloride copolymer solution by dissolving in an organic solvent a vinyl chloride copolymer consisting of 50 to 90 wt % of vinyl chloride and 10 to 50 wt % of vinyl ester and having a mean polymerization degree of 100 to 800 and hydrolyzing the solution in the presence of alcohol, the viscosity of the hydrolyzed solution of the vinyl chloride copolymer is adjusted to 500 to 1000 CPS and the alcohol and the organic solvent are distilled at a temperature below 60.degree. C. under a reduced pressure of 100 to 200 Torr and, when the alcohol content in the hydrolyzed solution becomes less than 0.5 wt %, the atmospheric pressure is restored.

REFERENCES:
patent: 2512726 (1950-06-01), Penn et al.
patent: 3573265 (1971-03-01), Koral et al.

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